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Re: [Anima] MACsec as an alternative to L3-tunnels

Michael Richardson <mcr+ietf@sandelman.ca> Fri, 26 July 2019 23:33 UTC

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From: Michael Richardson <mcr+ietf@sandelman.ca>
To: Toerless Eckert <tte@cs.fau.de>
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Comments: In-reply-to Toerless Eckert <tte@cs.fau.de> message dated "Thu, 25 Jul 2019 16:36:32 +0200."
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Date: Fri, 26 Jul 2019 19:33:41 -0400
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Subject: Re: [Anima] MACsec as an alternative to L3-tunnels
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Toerless Eckert <tte@cs.fau.de> wrote:
    > First of all, there is obviously an ability to filter out packets
    > NOT to encrypt. Otherwise you would have a lot of problems negotiating
    > the encryption keys. To the best of knowledge, what MUST be supported
    > in ethernet chips is such filtering based on ethertype because thats
    > whats being used also in 802.1x, the basic security architecture. See
    > ACP draft section A.10.2

Yes, but the key management packets can be packets that are "special"
at the MACsec level.

    > Secondly, i was told (and this is where i have not tried to validate),
    > that MacSec should equally be able to utilize multiple keypairs,
    > probably mapped by VLAN or ethertype. But the question of course is
    > whether you want/can expect that MACsec MIC chips have that feature.

The people in the line behind me did not agree.

--
Michael Richardson <mcr+IETF@sandelman.ca>, Sandelman Software Works
 -= IPv6 IoT consulting =-

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